Linux Device Drivers Development

HRT setup initialization

The HRT setup initialization is done as follows:

1. Initializing the hrtimer: Before hrtimer initialization, you need to set up a ktime, which represents time duration. We will see how to achieve that in the following example:

 void hrtimer_init( struct hrtimer *time, clockid_t which_clock, 
                    enum hrtimer_mode mode); 

2. Starting hrtimer: hrtimer can be started as shown in the following example:

int hrtimer_start( struct hrtimer *timer, ktime_t time, 
                    const enum hrtimer_mode mode); 

mode represents the expiry mode. It should be HRTIMER_MODE_ABS for an absolute time value, or HRTIMER_MODE_REL for a time value relative to now.

3. hrtimer cancellation: You can either cancel the timer or see whether it is possible to cancel ...